Exhaust mechanism for locomotives.



No. 685,277. Patented Oct. 29, 1901.

R. HARDING.

EXHAUST MECHANISM FOR LOCOMOTIVES.

(Application filed. Mar. 18, 1901.) (No Model.) 2 Sheets-Sheet I.

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Patented Oct 29, I90l.

R. HARDING. EXHAUST MECHANISM FOR LOCOMOTIVES.

(Application filed Mar. 18, 1901.)

- 2 Sheets8heet 2.

(l0 Mode'l.)

wuwwbo z Russell Harding UNITED STATES PATENT OFFICE.

RUSSELL HARDING, on sT. LOUIS, MIssoURI.

EXHAUST MECHANISM FOR LOCOMOTIVES.

SPECIFlCATION forming part of Letters Patent No. 685,277, dated Oetdber29, 1901.

Application filed March 18, 1901- $erial No. 51,655. (No model.)

To all whom it may concern:

Be it known that I, RUSSELL HARDING, a citizen of the United States,residing at the city of St. Louis, in the State of Missouri, haveinvented a certain new and useful Exhaust Mechanism for Locomotives, ofwhich the following is such a full, clear, and exact description as willenable any one skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, forming partof this specification.

The object of my invention'is to so construct an exhaust apparatus forlocomotives that the draft can be regulated so as to be substantiallyuniform during the variations in pressure of the exhaust-steam caused bythe change of the point at which the steam is cut 0K in the cylinders.

Still another object of my invention is to preventthe accumulation ofcoke and cinders in the smoke-box of a locomotive, so that the lowerflues of the boiler will not be obstructed and rendered useless.

My invention consists in certain novel features and details ofconstruction, all of which are fully described in the followingspecification and pointed out in the claims affixed hereto.

In the accompanying drawings, which illustrate the smoke-box of one formof locomotive made in accordance with my invention, Figure 1 is avertical longitudinal section. Fig. 2 is a vertical cross-section, andFig. 8 is an enlarged vertical longitudinal section of theexhaust-nozzle and a portion of the petticoat-pipe.

Like marks of reference refer to similar parts in the several views ofthe drawings.

5 is the smoke-box; 6, the smoke-box front; 7, the tube-sheet; S, thesmoke-stack, and 9 the boiler steam-pipes, all of the usualconstruction.

the extension 12 of the exhaust-nozzle 10 by means of arms 16. Thepetticoat-pipe 14 telescopes with a sleeve 17, carried by the upper partof the smoke-box 5 and extending into the smoke-stack 8. The sleeve 17is preferably provided with guideways 18, in which slide guide-pins 19,on the petticoat-pipe 14. In order to raise and lower the extension 12and attached petticoat-pipe 14, the said extension 12 is provided withtrunnions 20, which work in slots 21 in the bifurcated end of a Y-shapedpart 22. The opposite end of this Y- shaped part is rigidly secured to arock-shaft 23, journaled in the sideof the smoke-box 5. Secured to oneend of the rockshaft 23 is a crank-arm 24,to which is attached anoperating-rod 25, which extends back to the cab of the engine to bewithin the control of the engineer.

When a locomotive is first started, the steam is admitted to thecylinders during a large part of the stroke, so that the exhauststeampassing out through the exhaust-nozzle 10 is under considerablepressure.If the extension 12 of the exhaust-nozzle and the petticoat-pipe 14 arein their lowest position, as shown in Fig. 1, only a small portion ofthe air within the smoke-box will be lifted by the exhaust passing outof the nozzle, and hence the draft will be too great. In order toovercome this, the engineer, by means of the operating-rod 25, raisesthe extension 12 and petticoat pipe 14. The exhaust now must raise thelargest part of the air in the smoke-box, and consequently the draft isreduced. As soon as the engine has reached its normal speed the steamwill be out off in the cylinders at an earlier point, and hence thepressure of the exhaust will be less and the draft will decrease. Inorder to over come this, theextension 12 and petticoatpipe 14: arelowered, so that'a smaller amount of the air in the smoke-box must belifted, thus restoring the draft to its normal condition. This loweringof the extension and petticoat-pipe also brings the flared portion 15 ofthe pipe closer to the bottom of the smoke-box, and thus enables thedraft to carry out the light cinders and coke col lected in the bottomof the smoke-box, which it would not be able to do if the parts were intheir raised position. This prevents the clogging of the lower fines andthe consequent loss of their usefulness.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

1. The combination with the smoke-box of a locomotive, of a smoke-stackleading therefrom, an exhaust nozzle situated in said smoke-box, aetticoat-pipe projecting into said smoke-stack and having a flared lowerend terminating above the outlet of said exhaust-nozzle, and meanswithin the control of the engineer for raising and lowering saidpetticoat-pipe.

2. The combination with the smoke-box of a locomotive, of a smoke-stackleading therefrom, a petticoat-pipe extending into said smoke-stack andhaving a flared lower end, an exhaust-nozzle in said smoke-box, anextension for said exhaust-nozzle terminating below the lower end ofsaid petticoat-pipe, and means for raising and lowering said extension.

3. The combination with the smoke-box of a locomotive, of a smoke-stackleading therefrom, a etticoat-pipe extending into said smoke-staolganexhaust-nozzle in said smokebox, an extension for said exhaust-nozzleterminating below the lower end of said pettieoat-pipe, and means forsimultaneously raising and lowering said extension and petticoat-pipe.

4:. The combination with the smoke-box of a locomotive, of a smoke-stackleading therefrom, a petticoat-pipe extending into said smoke-staclganexhaust-nozzle in said smokebox, an extension for said nozzle carryingsaid pettieoat-pipe, and means for raising and lowering said extensionand attached pettieoat-pipe.

In testimony whereof I have hereunto set my hand and affixed my seal inthe presence of the two subscribing witnesses.

